John chivill



(No Model.)

J. OHIVIL L. SHAFT COUPLING.

No. 408,953. J Patented Aug. 13, 1889.

UNITED STATES PATENT OFFICE.

JOHN CHIVILL, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE IVEBSTER & COM-STOCK MANUFACTURING CQMPANY, OF SAME PLACE.

SHAFT-COUPLING.

SPECIFICATION forming part of Letters Patent N 0. 408,953, dated August13, 1889.

Application filed April 2, 1889. Serial No. 305,733. (No model.)

To all whom it may concern.-

Be it known that I, JOHN CHIVILL, of Chicago,in the county of Cook. andState of Illinois, have invented certain new and useful 5 Improvementsin Shaft-Couplings, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart of this specification, in which Figure l is a side view of ahanger, portions of two conveyer-shafts connected by means of myimproved coupling. Fig. 2 is a longitudinal sectional view thereof; andFig. 3 is atransverse sectional view taken upon the line a: 00, Fig. 1,viewed in the direction of the arrow there shown.

Like letters of reference in the different figures indicate like parts.

My invention relates to shaft-couplings, and particularly to thoseemployed in elevator-conveyers; and my object is to so construct saidcouplings that the respective sections of shaftings may be removedwithout in any way interfering with or disturbing the position of theothers or of the intervening hanger. Moreover, I desire to provide alarge bearing-surface between the connecting-bolt and that portion ofthe shaft wit-h which it is brought into contact, so as to prevent whatis commonly known as the shearing of the bolt by the shaft.

To these ends myinvention consists in the combination of elements,hereinafter more particularly described and claimed.

Referring to the drawings, A B represent two conveyer-shafts, whichconsist of gaspipe or other tubing, and have collars or sleeves to Z)cast or otherwise formed upon the ends thereof. Lugs Z), Figs. 1 and 3,are cast 40 upon said sleeves for the purpose of attaching the usualspiral flights thereto to serve as conveyers.

A hanger C is attached to the conveyortrough in the usual way, andserves asabearing for the coupling-shaft D, Figs. 2 and 3, which is madeof a sufficient length to extend into the shafts A B, preferably aboutthe length of the collars 0; b. Slots (Z (Z and bores (Z' d are formedin the coupling-shaft, 'while slots b b and bores b b are made in thesleeves a b to conform to the slots and bores, respectively, in saidcoupling-shaft.

Bolts E E, each of which is provided with a fiat oblong tapering head 6,adjusted to fit within both of the slots b d, as clearly shown in thedrawings, so as to provide alarge bearing-surface, serves to attach thecouplingshaft to the shafts A and B. Said bolts are secured by means ofnuts e e tapped thereon. In order to remove a section of theconveyer-shaft, the bolts E E are removed,when the coupling-shaft D ispushed into the remaining hollow conveyer-shaft a sufficient distance topermit the withdrawal of the shaft desired to be removed, thus greatlysimplifying this operation as compared with the old methods.

The large flat bearing-surface of the head E prevents the shearing ofthe bolt which occurs in the usual construction, and enables it to lastmuch longer.

Having thus described my invention, I claim 1. In a shaft-coupling, thecombin ation,with hollow shafts having longitudinal slots and bores,respectively, in their meeting ends, of an intervening hanger arrangedbetween said ends, a couplin -shaft having longitudinal slots and boresto conform to the respective positions of the slots and bores in saidhollow shafts, and bolts having flat heads adapted to fit within saidslots and bores, substantially as shown and described.

2. The combination of a hanger, bored and slotted shafts A B, bored andslotted coupling-shaft D, and bolts E E, having elongated flattenedheads, substantially as shown and described.

3. In a shaft-coupling, the combination of a hanger, hollow shaftsprovided with slots 11 and bores (2 a coupling-shaft having slots (1 cland bores d d, and bolts E E, having fiattened heads adapted to fitwithin said slots, substantially as shown and described.

In testimony whereof I have signed this specification, in the presenceof two subscribing witnesses, this 25th day of February, 1889.

J OIIN CHIVILL.

Witnesses:

D. H. FLETCHER, .l. HALPENNY.

